diff options
Diffstat (limited to 'lib/libc/stdtime/strftime.c')
| -rw-r--r-- | lib/libc/stdtime/strftime.c | 487 |
1 files changed, 349 insertions, 138 deletions
diff --git a/lib/libc/stdtime/strftime.c b/lib/libc/stdtime/strftime.c index 821bc7957467f..a5ba85c90473d 100644 --- a/lib/libc/stdtime/strftime.c +++ b/lib/libc/stdtime/strftime.c @@ -1,10 +1,9 @@ #ifndef lint #ifndef NOID -static char elsieid[] = "@(#)strftime.c 7.19"; +static char elsieid[] = "@(#)strftime.c 7.47"; /* ** Based on the UCB version with the ID appearing below. -** This is ANSIish only when time is treated identically in all locales and -** when "multibyte character == plain character". +** This is ANSIish only when "multibyte character == plain character". */ #endif /* !defined NOID */ #endif /* !defined lint */ @@ -12,64 +11,122 @@ static char elsieid[] = "@(#)strftime.c 7.19"; #include "private.h" /* - * Copyright (c) 1989 The Regents of the University of California. - * All rights reserved. - * - * Redistribution and use in source and binary forms are permitted - * provided that the above copyright notice and this paragraph are - * duplicated in all such forms and that any documentation, - * advertising materials, and other materials related to such - * distribution and use acknowledge that the software was developed - * by the University of California, Berkeley. The name of the - * University may not be used to endorse or promote products derived - * from this software without specific prior written permission. - * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR - * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED - * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. - */ +** Copyright (c) 1989 The Regents of the University of California. +** All rights reserved. +** +** Redistribution and use in source and binary forms are permitted +** provided that the above copyright notice and this paragraph are +** duplicated in all such forms and that any documentation, +** advertising materials, and other materials related to such +** distribution and use acknowledge that the software was developed +** by the University of California, Berkeley. The name of the +** University may not be used to endorse or promote products derived +** from this software without specific prior written permission. +** THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR +** IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED +** WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. +*/ #ifndef LIBC_SCCS #ifndef lint -static const char sccsid[] = "@(#)strftime.c 5.4 (Berkeley) 3/14/89"; +static const char sccsid[] = "@(#)strftime.c 5.4 (Berkeley) 3/14/89"; #endif /* !defined lint */ #endif /* !defined LIBC_SCCS */ #include "tzfile.h" +#include "fcntl.h" +#include "locale.h" -static const char afmt[][4] = { - "Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat" -}; -static const char Afmt[][10] = { - "Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", - "Saturday" +struct lc_time_T { + const char * mon[12]; + const char * month[12]; + const char * wday[7]; + const char * weekday[7]; + const char * X_fmt; + const char * x_fmt; + const char * c_fmt; + const char * am; + const char * pm; + const char * date_fmt; }; -static const char bfmt[][4] = { - "Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", - "Oct", "Nov", "Dec" -}; -static const char Bfmt[][10] = { - "January", "February", "March", "April", "May", "June", "July", - "August", "September", "October", "November", "December" + +#ifdef LOCALE_HOME +#include "sys/stat.h" +static struct lc_time_T localebuf; +static struct lc_time_T * _loc P((void)); +#define Locale _loc() +#endif /* defined LOCALE_HOME */ +#ifndef LOCALE_HOME +#define Locale (&C_time_locale) +#endif /* !defined LOCALE_HOME */ + +static const struct lc_time_T C_time_locale = { + { + "Jan", "Feb", "Mar", "Apr", "May", "Jun", + "Jul", "Aug", "Sep", "Oct", "Nov", "Dec" + }, { + "January", "February", "March", "April", "May", "June", + "July", "August", "September", "October", "November", "December" + }, { + "Sun", "Mon", "Tue", "Wed", + "Thu", "Fri", "Sat" + }, { + "Sunday", "Monday", "Tuesday", "Wednesday", + "Thursday", "Friday", "Saturday" + }, + + /* X_fmt */ + "%H:%M:%S", + + /* + ** x_fmt + ** Since the C language standard calls for + ** "date, using locale's date format," anything goes. + ** Using just numbers (as here) makes Quakers happier; + ** it's also compatible with SVR4. + */ + "%m/%d/%y", + + /* + ** c_fmt + ** Note that + ** "%a %b %d %H:%M:%S %Y" + ** is used by Solaris 2.3. + */ + "%D %X", /* %m/%d/%y %H:%M:%S */ + + /* am */ + "AM", + + /* pm */ + "PM", + + /* date_fmt */ + "%a %b %e %H:%M:%S %Z %Y" }; -static char *_add P((const char *, char *, const char *)); -static char *_conv P((int, const char *, char *, const char *)); -static char *_fmt P((const char *, const struct tm *, char *, const char *)); +static char * _add P((const char *, char *, const char *)); +static char * _conv P((int, const char *, char *, const char *)); +static char * _fmt P((const char *, const struct tm *, char *, const char *)); size_t strftime P((char *, size_t, const char *, const struct tm *)); -extern char *tzname[]; +extern char * tzname[]; size_t strftime(s, maxsize, format, t) - char *s; - size_t maxsize; - const char *format; - const struct tm *t; +char * const s; +const size_t maxsize; +const char * const format; +const struct tm * const t; { - char *p; + char * p; - p = _fmt(format, t, s, s + maxsize); + tzset(); +#ifdef LOCALE_HOME + localebuf.mon[0] = 0; +#endif /* defined LOCALE_HOME */ + p = _fmt(((format == NULL) ? "%c" : format), t, s, s + maxsize); if (p == s + maxsize) return 0; *p = '\0'; @@ -78,37 +135,38 @@ strftime(s, maxsize, format, t) static char * _fmt(format, t, pt, ptlim) - const char *format; - const struct tm *t; - char *pt; - const char *ptlim; +const char * format; +const struct tm * const t; +char * pt; +const char * const ptlim; { - for (; *format; ++format) { + for ( ; *format; ++format) { if (*format == '%') { label: - switch(*++format) { + switch (*++format) { case '\0': --format; break; case 'A': pt = _add((t->tm_wday < 0 || t->tm_wday > 6) ? - "?" : Afmt[t->tm_wday], pt, ptlim); + "?" : Locale->weekday[t->tm_wday], + pt, ptlim); continue; case 'a': pt = _add((t->tm_wday < 0 || t->tm_wday > 6) ? - "?" : afmt[t->tm_wday], pt, ptlim); + "?" : Locale->wday[t->tm_wday], + pt, ptlim); continue; case 'B': pt = _add((t->tm_mon < 0 || t->tm_mon > 11) ? - "?" : Bfmt[t->tm_mon], pt, ptlim); + "?" : Locale->month[t->tm_mon], + pt, ptlim); continue; case 'b': case 'h': pt = _add((t->tm_mon < 0 || t->tm_mon > 11) ? - "?" : bfmt[t->tm_mon], pt, ptlim); - continue; - case 'c': - pt = _fmt("%D %X", t, pt, ptlim); + "?" : Locale->mon[t->tm_mon], + pt, ptlim); continue; case 'C': /* @@ -121,27 +179,10 @@ label: pt = _conv((t->tm_year + TM_YEAR_BASE) / 100, "%02d", pt, ptlim); continue; - case 'D': - pt = _fmt("%m/%d/%y", t, pt, ptlim); + case 'c': + pt = _fmt(Locale->c_fmt, t, pt, ptlim); continue; - case 'x': - /* - ** Version 3.0 of strftime from Arnold Robbins - ** (arnold@skeeve.atl.ga.us) does the - ** equivalent of... - ** _fmt("%a %b %e %Y"); - ** ...for %x; since the X3J11 C language - ** standard calls for "date, using locale's - ** date format," anything goes. Using just - ** numbers (as here) makes Quakers happier. - ** Word from Paul Eggert (eggert@twinsun.com) - ** is that %Y-%m-%d is the ISO standard date - ** format, specified in ISO 2014 and later - ** ISO 8601:1988, with a summary available in - ** pub/doc/ISO/english/ISO8601.ps.Z on - ** ftp.uni-erlangen.de. - ** (ado, 5/30/93) - */ + case 'D': pt = _fmt("%m/%d/%y", t, pt, ptlim); continue; case 'd': @@ -220,7 +261,9 @@ label: pt = _add("\n", pt, ptlim); continue; case 'p': - pt = _add(t->tm_hour >= 12 ? "PM" : "AM", + pt = _add((t->tm_hour >= 12) ? + Locale->pm : + Locale->am, pt, ptlim); continue; case 'R': @@ -232,8 +275,24 @@ label: case 'S': pt = _conv(t->tm_sec, "%02d", pt, ptlim); continue; + case 's': + { + struct tm tm; + char buf[INT_STRLEN_MAXIMUM( + time_t) + 1]; + time_t mkt; + + tm = *t; + mkt = mktime(&tm); + if (TYPE_SIGNED(time_t)) + (void) sprintf(buf, "%ld", + (long) mkt); + else (void) sprintf(buf, "%lu", + (unsigned long) mkt); + pt = _add(buf, pt, ptlim); + } + continue; case 'T': - case 'X': pt = _fmt("%H:%M:%S", t, pt, ptlim); continue; case 't': @@ -253,66 +312,86 @@ label: pt = _conv((t->tm_wday == 0) ? 7 : t->tm_wday, "%d", pt, ptlim); continue; - case 'V': - /* - ** From Arnold Robbins' strftime version 3.0: - ** "the week number of the year (the first - ** Monday as the first day of week 1) as a - ** decimal number (01-53). The method for - ** determining the week number is as specified - ** by ISO 8601 (to wit: if the week containing - ** January 1 has four or more days in the new - ** year, then it is week 1, otherwise it is - ** week 53 of the previous year and the next - ** week is week 1)." - ** (ado, 5/24/93) - */ - /* - ** XXX--If January 1 falls on a Friday, - ** January 1-3 are part of week 53 of the - ** previous year. By analogy, if January - ** 1 falls on a Thursday, are December 29-31 - ** of the PREVIOUS year part of week 1??? - ** (ado 5/24/93) - ** - ** You are understood not to expect this. - */ + case 'V': /* ISO 8601 week number */ + case 'G': /* ISO 8601 year (four digits) */ + case 'g': /* ISO 8601 year (two digits) */ +/* +** From Arnold Robbins' strftime version 3.0: "the week number of the +** year (the first Monday as the first day of week 1) as a decimal number +** (01-53)." +** (ado, 1993-05-24) +** +** From "http://www.ft.uni-erlangen.de/~mskuhn/iso-time.html" by Markus Kuhn: +** "Week 01 of a year is per definition the first week which has the +** Thursday in this year, which is equivalent to the week which contains +** the fourth day of January. In other words, the first week of a new year +** is the week which has the majority of its days in the new year. Week 01 +** might also contain days from the previous year and the week before week +** 01 of a year is the last week (52 or 53) of the previous year even if +** it contains days from the new year. A week starts with Monday (day 1) +** and ends with Sunday (day 7). For example, the first week of the year +** 1997 lasts from 1996-12-30 to 1997-01-05..." +** (ado, 1996-01-02) +*/ { - int i; + int year; + int yday; + int wday; + int w; - i = (t->tm_yday + 10 - (t->tm_wday ? - (t->tm_wday - 1) : 6)) / 7; - if (i == 0) { + year = t->tm_year + TM_YEAR_BASE; + yday = t->tm_yday; + wday = t->tm_wday; + for ( ; ; ) { + int len; + int bot; + int top; + + len = isleap(year) ? + DAYSPERLYEAR : + DAYSPERNYEAR; /* - ** What day of the week does - ** January 1 fall on? + ** What yday (-3 ... 3) does + ** the ISO year begin on? */ - i = t->tm_wday - - (t->tm_yday - 1); + bot = ((yday + 11 - wday) % + DAYSPERWEEK) - 3; /* - ** Fri Jan 1: 53 - ** Sun Jan 1: 52 - ** Sat Jan 1: 53 if previous - ** year a leap - ** year, else 52 + ** What yday does the NEXT + ** ISO year begin on? */ - if (i == TM_FRIDAY) - i = 53; - else if (i == TM_SUNDAY) - i = 52; - else i = isleap(t->tm_year + - TM_YEAR_BASE) ? - 53 : 52; + top = bot - + (len % DAYSPERWEEK); + if (top < -3) + top += DAYSPERWEEK; + top += len; + if (yday >= top) { + ++year; + w = 1; + break; + } + if (yday >= bot) { + w = 1 + ((yday - bot) / + DAYSPERWEEK); + break; + } + --year; + yday += isleap(year) ? + DAYSPERLYEAR : + DAYSPERNYEAR; + } #ifdef XPG4_1994_04_09 - /* - ** As of 4/9/94, though, - ** XPG4 calls for 53 - ** unconditionally. - */ - i = 53; + if (w == 52 && t->tm_mon == TM_JANUARY) + w = 53; #endif /* defined XPG4_1994_04_09 */ - } - pt = _conv(i, "%02d", pt, ptlim); + if (*format == 'V') + pt = _conv(w, "%02d", + pt, ptlim); + else if (*format == 'G') + pt = _conv(year, "%02d", + pt, ptlim); + else pt = _conv(year, "%04d", + pt, ptlim); } continue; case 'v': @@ -332,6 +411,12 @@ label: case 'w': pt = _conv(t->tm_wday, "%d", pt, ptlim); continue; + case 'X': + pt = _fmt(Locale->X_fmt, t, pt, ptlim); + continue; + case 'x': + pt = _fmt(Locale->x_fmt, t, pt, ptlim); + continue; case 'y': pt = _conv((t->tm_year + TM_YEAR_BASE) % 100, "%02d", pt, ptlim); @@ -342,7 +427,7 @@ label: continue; case 'Z': #ifdef TM_ZONE - if (t->TM_ZONE) + if (t->TM_ZONE != NULL) pt = _add(t->TM_ZONE, pt, ptlim); else #endif /* defined TM_ZONE */ @@ -351,6 +436,9 @@ label: pt, ptlim); } else pt = _add("?", pt, ptlim); continue; + case '+': + pt = _fmt(Locale->date_fmt, t, pt, ptlim); + continue; case '%': /* * X311J/88-090 (4.12.3.5): if conversion char is @@ -370,12 +458,12 @@ label: static char * _conv(n, format, pt, ptlim) - int n; - const char *format; - char *pt; - const char *ptlim; +const int n; +const char * const format; +char * const pt; +const char * const ptlim; { - char buf[INT_STRLEN_MAXIMUM(int) + 1]; + char buf[INT_STRLEN_MAXIMUM(int) + 1]; (void) sprintf(buf, format, n); return _add(buf, pt, ptlim); @@ -383,11 +471,134 @@ _conv(n, format, pt, ptlim) static char * _add(str, pt, ptlim) - const char *str; - char *pt; - const char *ptlim; +const char * str; +char * pt; +const char * const ptlim; { while (pt < ptlim && (*pt = *str++) != '\0') ++pt; return pt; } + +#ifdef LOCALE_HOME +static struct lc_time_T * +_loc P((void)) +{ + static const char locale_home[] = LOCALE_HOME; + static const char lc_time[] = "LC_TIME"; + static char * locale_buf; + static char locale_buf_C[] = "C"; + + int fd; + int oldsun; /* "...ain't got nothin' to do..." */ + char * lbuf; + char * name; + char * p; + const char ** ap; + const char * plim; + char filename[FILENAME_MAX]; + struct stat st; + size_t namesize; + size_t bufsize; + + /* + ** Use localebuf.mon[0] to signal whether locale is already set up. + */ + if (localebuf.mon[0]) + return &localebuf; + name = setlocale(LC_TIME, (char *) NULL); + if (name == NULL || *name == '\0') + goto no_locale; + /* + ** If the locale name is the same as our cache, use the cache. + */ + lbuf = locale_buf; + if (lbuf != NULL && strcmp(name, lbuf) == 0) { + p = lbuf; + for (ap = (const char **) &localebuf; + ap < (const char **) (&localebuf + 1); + ++ap) + *ap = p += strlen(p) + 1; + return &localebuf; + } + /* + ** Slurp the locale file into the cache. + */ + namesize = strlen(name) + 1; + if (sizeof(filename) < + sizeof(locale_home) + namesize + sizeof(lc_time)) + goto no_locale; + oldsun = 0; + (void) sprintf(filename, "%s/%s/%s", locale_home, name, lc_time); + fd = open(filename, O_RDONLY); + if (fd < 0) { + /* + ** Old Sun systems have a different naming and data convention. + */ + oldsun = 1; + (void) sprintf(filename, "%s/%s/%s", locale_home, + lc_time, name); + fd = open(filename, O_RDONLY); + if (fd < 0) + goto no_locale; + } + if (fstat(fd, &st) != 0) + goto bad_locale; + if (st.st_size <= 0) + goto bad_locale; + bufsize = namesize + st.st_size; + locale_buf = NULL; + lbuf = (lbuf == NULL || lbuf == locale_buf_C) ? + malloc(bufsize) : realloc(lbuf, bufsize); + if (lbuf == NULL) + goto bad_locale; + (void) strcpy(lbuf, name); + p = lbuf + namesize; + plim = p + st.st_size; + if (read(fd, p, (size_t) st.st_size) != st.st_size) + goto bad_lbuf; + if (close(fd) != 0) + goto bad_lbuf; + /* + ** Parse the locale file into localebuf. + */ + if (plim[-1] != '\n') + goto bad_lbuf; + for (ap = (const char **) &localebuf; + ap < (const char **) (&localebuf + 1); + ++ap) { + if (p == plim) + goto bad_lbuf; + *ap = p; + while (*p != '\n') + ++p; + *p++ = '\0'; + } + if (oldsun) { + /* + ** SunOS 4 used an obsolescent format; see localdtconv(3). + ** c_fmt had the ``short format for dates and times together'' + ** (SunOS 4 date, "%a %b %e %T %Z %Y" in the C locale); + ** date_fmt had the ``long format for dates'' + ** (SunOS 4 strftime %C, "%A, %B %e, %Y" in the C locale). + ** Discard the latter in favor of the former. + */ + localebuf.date_fmt = localebuf.c_fmt; + } + /* + ** Record the successful parse in the cache. + */ + locale_buf = lbuf; + + return &localebuf; + +bad_lbuf: + free(lbuf); +bad_locale: + (void) close(fd); +no_locale: + localebuf = C_time_locale; + locale_buf = locale_buf_C; + return &localebuf; +} +#endif /* defined LOCALE_HOME */ |